Styrene-isoprene-styrene block copolymer composition for low vis

Details Styrene-isoprene-styrene block copolymer composition for low vis Styrene-isoprene-styrene block copolymer composition for low vis

1990-04-11

1992-06-02

Seidleck, James J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525 97, 525 98, C08F29704, C08L 5302

Patent

active

051187620

ABSTRACT:
A low viscosity low temperature hot melt adhesive which contains a predominantly branched styrene-isoprene-styrene block copolymer composition comprised of linear polymeric blocks wherein the polystyrene block molecular weight is greater than about 12,000, the polystyrene content is about 35% or less by weight of the block copolymer composition and the molecular weight of the block copolymer composition and the coupling efficiency are chosen so that the melt viscosity of the adhesive made with the composition is less than about 3100 cps.

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